Unavailability Effects on Message Processing: A Theoretical Analysis an Empirical Test

This study is concerned with the ability of standard indexes, of socioeconomic status and similar devices to measure major dimensions of social stratification for whites and blacks. Factor analyses of survey data for samples of both races uncovered five matching factors and two others unique to a single sample, all of which seem to represent important components of stratification. Most of the indexes were relevant to three matching factors, and some of these measures consistently loaded them in both samples. However, several of the pertinent indexes only loaded white versions of these factors, and some failed to load any. Few, if any, indexes were relevant to or loaded the remaining factors. Additionally, some indexes were not pertinent to and did not load any factor. In contrast to the indexes, other variables loaded all but one of the factors. The main conclusions are that: (1) the coverage of the indexes is restricted; (2) the devices are not uniformly applicable to blacks; and (3) the complexity of this domain requires separate measures of each factor, achievable by combining standard indexes and new variables.